completed the lab

src/main/java/com/zipcodewilmington/StringArrayUtils.java

@@ -1,5 +1,9 @@
 package com.zipcodewilmington;
 
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
 /**
  * Created by leon on 1/29/18.
  */
@@ -9,7 +13,8 @@ public class StringArrayUtils {
      * @return first element of specified array
      */ // TODO
     public static String getFirstElement(String[] array) {
-        return null;
+
+        return array[0];
     }
 
     /**
@@ -17,7 +22,8 @@ public class StringArrayUtils {
      * @return second element in specified array
      */
     public static String getSecondElement(String[] array) {
-        return null;
+
+        return array[1];
     }
 
     /**
@@ -25,7 +31,8 @@ public class StringArrayUtils {
      * @return last element in specified array
      */ // TODO
     public static String getLastElement(String[] array) {
-        return null;
+
+        return array[array.length - 1];
     }
 
     /**
@@ -33,7 +40,8 @@ public class StringArrayUtils {
      * @return second to last element in specified array
      */ // TODO
     public static String getSecondToLastElement(String[] array) {
-        return null;
+
+        return array[array.length - 2];
     }
 
     /**
@@ -42,7 +50,13 @@ public class StringArrayUtils {
      * @return true if the array contains the specified `value`
      */ // TODO
     public static boolean contains(String[] array, String value) {
-        return false;
+
+        List<String> list = new ArrayList<String>();
+        list = Arrays.asList(array);
+        if (list.contains(value))
+            return true;
+        else
+            return false;
     }
 
     /**
@@ -50,15 +64,35 @@ public class StringArrayUtils {
      * @return an array with identical contents in reverse order
      */ // TODO
     public static String[] reverse(String[] array) {
-        return null;
+
+        String revArray[] = new String[9];
+        for (int i = array.length - 1, j = 0; i >= 0; i--, j++) {
+            revArray[j] = array[i];
+        }
+
+        return revArray;
     }
 
+
     /**
      * @param array array of String objects
      * @return true if the order of the array is the same backwards and forwards
      */ // TODO
     public static boolean isPalindromic(String[] array) {
-        return false;
+
+        String revArray[] = new String[9];
+        for (int i = array.length - 1, j = 0; i >= 0; i--, j++) {
+            revArray[j] = array[i];
+        }
+
+        for (int i = 0; i < array.length; i++) {
+            if (array[i].equals(revArray[i]))
+                continue;
+            else
+                return false;
+        }
+
+        return true;
     }
 
     /**
@@ -66,16 +100,38 @@ public class StringArrayUtils {
      * @return true if each letter in the alphabet has been used in the array
      */ // TODO
     public static boolean isPangramic(String[] array) {
-        return false;
+
+        boolean check = false;
+        StringBuilder sb = new StringBuilder();
+        int i = 0;
+        for (i = 0; i < array.length; i++) {
+            sb.append(array[i]);
+            String newString = sb.toString().toLowerCase();
+            for (char ch = 'a'; ch <= 'z'; ch++) {
+                if (newString.indexOf(ch) == -1) {
+                    check = false;
+                } else
+                    check = true;
+
+            }
+        }
+        return check;
     }
 
+
+
     /**
      * @param array array of String objects
      * @param value value to check array for
      * @return number of occurrences the specified `value` has occurred
      */ // TODO
     public static int getNumberOfOccurrences(String[] array, String value) {
-        return 0;
+        int count = 0;
+        for (String s : array) {
+            if (s.equals(value))
+                count++;
+        }
+        return count;
     }
 
     /**
@@ -84,7 +140,16 @@ public class StringArrayUtils {
      * @return array with identical contents excluding values of `value`
      */ // TODO
     public static String[] removeValue(String[] array, String valueToRemove) {
-        return null;
+
+        List<String> list = new ArrayList<String>(Arrays.asList(array));
+        // list = Arrays.asList(array);
+        //for(String s : list)
+        //{
+        //  if(s.equals(valueToRemove))
+        list.remove(valueToRemove);
+        // }
+        array = list.toArray(new String[0]);
+        return array;
     }
 
     /**
@@ -92,7 +157,19 @@ public class StringArrayUtils {
      * @return array of Strings with consecutive duplicates removes
      */ // TODO
     public static String[] removeConsecutiveDuplicates(String[] array) {
-        return null;
+
+        List<String> list = new ArrayList<String>();
+        for (int i = 0; i < array.length; i++) {
+
+            if (i + 1 < array.length && array[i].equals(array[i + 1])) {
+                continue;
+            } else
+                list.add(array[i]);
+
+        }
+
+        String[] finArray = list.toArray(new String[0]);
+        return finArray;
     }
 
     /**
@@ -100,8 +177,25 @@ public class StringArrayUtils {
      * @return array of Strings with each consecutive duplicate occurrence concatenated as a single string in an array of Strings
      */ // TODO
     public static String[] packConsecutiveDuplicates(String[] array) {
-        return null;
-    }
 
+        ArrayList<String>  list = new ArrayList<String>();
+        for (int i = 0; i < array.length; i++) {
+            StringBuilder sb = new StringBuilder();
+            sb.append(array[i]);
+            while (i + 1 < array.length && array[i].equals(array[i + 1])) {
+                sb.append(array[i+1]);
+                i++;
+            }
+            list.add(sb.toString());
+
+        }
+
+        String[] finArray = list.toArray(new String[0]);
+        return finArray;
+
+
+
+
+    }
 
 }

src/test/java/com/zipcodewilmington/StringArrayUtilsTest.java

@@ -374,7 +374,7 @@ public class StringArrayUtilsTest {
         String[] array = {"a", "a", "a", "b", "c", "c", "a", "a", "d"};
         String[] expected = {"aaa", "b", "cc", "aa", "d"};
         String[] actual = StringArrayUtils.packConsecutiveDuplicates(array);
-        Assert.assertEquals(expected, actual);
+        Assert.assertArrayEquals(expected, actual);
     }